Pipe-wrench.



W. J. HAMBLIN.

PIPE WRENCH. APPLICATION FILED APILZI, 1914.

Patented June 2, 1914 Gnome/1:;

WALTER JAMES HAMBLiN, or PERTH, WESTERN AUsTRALTA, AUSTRALIA.

PIPE-WRENCH.

Specification of Letters Patent.

imam.

Application filed April 21, 1914. Serial No. 833,464.

in. the State of lVestern Aust alia, Ans} tralia have invented certain new and useful Improvements in Pipe-VVrencheS, of which the following is a run, clear, and exact specification.

This invention relates to pipe Wrenches, and has for its object to provide such a tool of improved constructioncapable of operation in either direction and of being reversed without removal from the pipe.

l urther objects are to strengthen the wrench and make it more sure in its grip upon the pipe without complicating the con striu-tiou of the tool, and to provide a wrench which will not 1115111601'. damage the pipe operated upon in any way.

Other objects will a'ppea r tion proceeds.

The invention will be first hereinafter de' scribed in connection with the accompanying drawings, which constitute a part of this specification, and then more specifically delined in the. claims at the end of the descrip tion.

In the accompanying drawings, wherein the various reference characters represent the same parts in each of the views :-Figure 1 is a side elevation of a wrench constructed in accordance with my invention, part. of the handle being broken away. Fig. 2 is an edge view thcreoi. Fig. 3 is an. end view looking at the outer end of the head, and Fig. a sectional view of the head taken on the line Ii JV of 2.

The handle A of the wrench is provided at. one end with an enlarged head B generally circular in form. A. yoke-shaped catch grip (l is axially pivoted to the head by means of a pin D. On one side of the head, the lateral ttaces thereof are cut away, as at E from a point adjacent the handle to a point on the outer portion of the head on the opposite side of the pivot pin I), see Fig. l. a. link or grip F straddles the portion G between the lateral recesses E about midway oi the length oi said recesses, and is cccentrically pivoted by a pin f with respect to the head at that point, whereby said link or grip F adapted to swing through an arc of at least 180. To the outer end as the descripof said link or grip there is attached one 1 end of a chain H having spaced lateral projections K, see Figs. 1 and 3.

The yoke (l has a slot or way L "out through its outer end portion which slot or way substantially equal in width to the chain H. The inner walls ot the slot or way L are recessed at M and N to provide catches 0 adapted to engage the lateral projeotions K on the chain F toholdsaid chain about a pipe when the tool is operated, as inns trated in Fig. 1. In this figure the wrench is shown applied to a rather small pi-ps1 but it will be understood thatthe toolniav be adjusted to fit pipes varying tl'iroughoiit a wide range of sizes. \Vhen the tool operated in one direction thecatch grip- C comes into play, whereas when the wriich operated in the opposite direction the link or. grip F comes .into actioin hen .1. the catch grip C is in use, the link F serves simply as a part of the chain.

The inner portion R of the head. adjacent the handle, is made eccentric to limit the movement of the catch grip C in one direction. T he movement of said catch grip C in the other direction is limited by the link F over which the catch grip C is adapted to swing by reason of the fact that said link is pivotally mounted in the lateral recesses E.

l-laving thus described my invention, what I claim as new and desire to secure by Letters Patent oi the United States is:

l. A pipe wrench having at one end oi its handle an enlarge-(fl substantially circular head, a catch grip axially pivoted to swing about said head. a. link ecmn'itrically pivoted to said head, and a chain secured to the outer end oi? the link and provided with lateral projections tor engaging a recess in the catch grip to lock said chain about a pipe when the tool is operated in either direction.

A pipe wrench having at one end of its handle an enlarged substantially circular head, a catch grip axially pivoted to swing about said head, a link eccentrically pivoted to said head. there being an arcuate recess in the lateral face of the head in which the link is pivoted, whereby said link is adapted to swing into the arc of movement of the catch grip, and a chain secured to the outer end of the link and provided with lateral projer tions for engaging a recess in the catch grip to lock said chain about a pipe when the tool is operated in either direction.

3. .iv pipe wrench having at one end of its Patented his a, 1?;14.

handle an enlarged substantially circular head, a catch grip axially pivoted to swing about said head and having a concave gripping face, a link eccentrically pivoted to said head, and a chain secured to the outer end of the link and provided with means of adjustable connection with the catch grip to locksaid chain about a pipe when the tool is operated in either direction.

4. A pipe wrench having at one end of its handle an enlarged substantially circular head, a catch grip axially pivoted to swing about said head, a link eccentrically pivoted to said head to swing irrespective of the catch grip and into the same are of movement therewith, and a chain secured to the outer end of the link and provided with means of adjustable connection with the catch grip to lock said chain about a pipe.

5. A pipe wrench having at one end of its handle an enlarged substantially circular head, a catch grip axially pivoted to swing about the head, a link eccentrically pivoted to said head, there being an arcuate recess in Q the lateral face of the head in which the link is pivoted, whereby said link is adapted to swing through an arc of approximately one hundred and eighty degrees, includingi part of the arc of movement of the catch grip, and a chain secured to the outer end ot' the link and provided with means of adjustable connection with the catch grip to lock said chain about a pipe when the tool is operated.

6. A pipe wrench having at one end of its handle an enlarged substantially circular head provided with eccentric portions adjacent the handle, a catch grip axially pivoted to swing about the head, a link eccentrically pivoted to said head within the plane of the catch grip, the eccentric portions of the head serving to limit the swing of the catch grip in one direction and the link limiting its movement in the other direction, and a chain secured to the link and provided with means of adjustable connection with the catch grip to lock said chain about a pipe when the tool is operated.

In testimony whereof I have signed my name to this specification in the presence of two attesting witnesses.

WVALTER JAMES HAMBLIN.

\Vitnesses CHAs. E. RIORDAN, E. L. WILLIAMS.

copiel of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

